BGP fast reroute in a VPRN configuration

Configuring the enable-bgp-vpn-backup command under config>service>vprn causes only imported BGP-VPN routes to be considered when selecting the primary and backup paths.

This command is required to support fast failover of ingress traffic from one remote PE to another remote PE.

Note: 7210 SAS devices do not support BGP backup path command that is used to enable consideration of multiple paths learned from CE BGP peers when selecting primary and backup path to reach the CE.